The second SoWaDi device was built this week by a second group of students. We were able to use our experience from the first construction and the students were able to take a look at the first device. Because of this and the fact that we were able to reuse the self made tools for pipe bending and deep-drawing the second construction was already finished after only three days. The wooden rack was replaced by a steel construction, which should be more durable and was only slightly more expensive compared to the timber version.
Parallel to the construction Elli conducted microbiological water tests with the first device and the results show great success: there is bacteria in the input water, but the device was always able to completely remove these and there was no bacteria found in the output water.
After these successful tests we were able to celebrate the inauguration of both of the devices on Friday. The students received two signed footballs from us for their hard work and took some group photos.
Later Elli took the bus to the airport to go back to Germany. In the coming days Ludwig and Tim will meet with some NGOs, more tests and also give a workshop on the functioning principle and the construction of the device.